Wireless AP Channel Assignment Using Neighbor Impact Metrics
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Solution Overview
Problem
Existing wireless access networks face challenges in optimizing channel assignments to balance interference, frequency diversity, and load distribution among access points, leading to inefficiencies in communication performance and network utilization.
Innovation Solution
A method and system for dynamically assigning channels to access points based on local and network-wide communication conditions, prioritizing overall network performance over individual access point performance, using neighbor impact metrics and centralized resource management to optimize channel assignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channels are assigned to access points to maximize individual performance, then communication performance of each access point is improved, but overall network efficiency and interference balance deteriorate
Solution Approach 1:
The patent changes the parameter of channel assignment from individual-access-point-oriented to network-wide-oriented. By using centralized resource management and neighbor impact metrics, the system dynamically adjusts channel assignments based on overall network conditions rather than individual AP performance, thereby resolving the contradiction between individual reliability and network productivity
Solution Approach 2:
The patent introduces a centralized resource manager as an intermediary between access points and channel assignment decisions. This mediator collects information from multiple access points, evaluates neighbor impact metrics, and makes coordinated channel assignments that balance network efficiency with individual performance requirements
2Productivity
If channel assignments are made dynamically based on network conditions, then network efficiency is improved, but system complexity increases
Solution Approach 1:
The patent merges the channel assignment function with centralized resource management. By combining multiple access points into a coordinated network managed by a central resource manager, the system achieves dynamic optimization without requiring each individual access point to implement complex decision-making logic, thus managing system complexity while improving efficiency
3Reliability
If centralized resource management is used for channel assignment, then overall network performance is optimized, but management overhead and complexity increase
Solution Approach 1:
The patent implements feedback mechanisms where access points report their operational status and neighbor information to the centralized resource manager. This feedback loop enables the manager to make informed channel assignment decisions based on real-time network conditions, optimizing overall performance while keeping the management system relatively simple through automated information collection and processing
Data Source
AI summary
Channel assignment for wireless access networks is directed toward improved overall communication capability of the networks. A network is formed of wireless access points (APs) coupled via wired (and/or wireless) links and enabled to communicate with clients via radio channels of each of the APs. Local information is collected at each of the APs and processed to determine channel assignments according to a Neighbor Impact Metric (NIM) that accounts for one-hop and two-hop neighbors as well as neighbors not part of the network. Optionally, the NIM accounts for traffic load on the APs. The channel assignments are determined either on a centralized resource (such as a server or one of the APs) or via a distributed scheme across the APs. The local information includes how busy a channel is and local operating conditions such as error rate and interference levels.